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Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Body plan of an arthropod, as represented by a grasshopper Body plan of an arthropod, as represented by a grasshopper
Butterfly body Butterfly body
Body weight estimates. Body weight estimates.
The Body as Mapped on the Motor Cortex and Somatosensory Cortex The Body as Mapped on the Motor Cortex and Somatosensory Cortex
Examples of Body Regions and Their Location Examples of Body Regions and Their Location
Adult sponge, with a porous, asymmetrical body. Adult sponge, with a porous, asymmetrical body.
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